code-android-app: Skill for Claude Code

.claude/skills/fetch-protos/SKILL.md

fetch-protos is a skill for Claude Code from code-payments/code-android-app. It costs 46 tokens per session (3,295 once invoked), scanned A, original, MIT.

A skill for updating published protobuf client libraries—shared definitions for data exchanged between services—and preparing the Android code for their changes.

In plain words
What is it for?
It checks Flipcash or OpenCode Protocol releases, updates the Gradle version pin, summarizes contract changes, and scaffolds new service stubs.
Why use it?
It replaces manual contract updates with a defined process for changing the pinned library version and responding to new definitions.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter. Also seen: mentions OpenCode.

This is code-payments/code-android-app's own configuration. It tells Claude Code how to work on code-android-app itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything code-android-app configures →

Reuse

Borrowing it

Nothing to install: this file belongs to code-payments/code-android-app. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/code-payments/code-android-app/code/cash/.claude/skills/fetch-protos/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/code-payments/code-android-app

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for fetch-protos

README.md
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Your own site
<a href="https://agentmods.dev/skills/code-payments/code-android-app/fetch-protos"><img src="https://agentmods.dev/badge/skills/code-payments/code-android-app/fetch-protos/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for fetch-protos

Your own site · 80×15
<a href="https://agentmods.dev/skills/code-payments/code-android-app/fetch-protos"><img src="https://agentmods.dev/badge/skills/code-payments/code-android-app/fetch-protos.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 46 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,295 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 1 finding, up to medium

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • medium Excessive Agency · line 328
    Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.
    Fix: Add human-in-the-loop confirmation for destructive, irreversible, or high-impact operations. Never auto-execute commands that modify files, send data, or alter system state.
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00046 $0.03295
Opus 5.5 $0.00018 $0.01318
Sonnet 5.5 $0.00009 $0.00659
Haiku 4.5 $0.00005 $0.00330

Measured 1mo ago against content hash 05836602b72f, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

fetch-protos scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.claude/skills/fetch-protos/SKILL.md · 334 lines

How it starts

The opening of the file, as written. The whole thing — 334 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Fetch Protos

Both contracts arrive as published artifacts, not as protos in this repo, so "fetching" is bumping a version pin and reacting to what the new version changed.

Target Artifact Client repo Upstream contract
flipcash com.flipcash:flipcash2-client-protocol code-payments/flipcash2-client-protocol code-payments/flipcash2-protobuf-api
opencode com.flipcash:ocp-client-protocol code-payments/ocp-client-protocol code-payments/ocp-protobuf-api

Pre-flight context

  • Pinned versions: !grep -E "^(ocp|flipcash2)-client-protocol = " gradle/libs.versions.toml
  • Local override: !grep -E "^protoLocalRoot" local.properties 2>/dev/null || echo "none — building against the pins above"
  • Git status: !git status --short gradle/libs.versions.toml services/

Input

Parse $ARGUMENTS to determine targets and an optional version.

Rules:

  • Known targets: flipcash, opencode
  • If no targets specified, check both
  • A semver-looking string is the version to move to; without one, use the latest release
  • The word scaffold anywhere in the arguments opts in to Step 6 scaffolding
  • Examples:
    • /fetch-protos → check both artifacts for newer releases
    • /fetch-protos flipcash → flipcash only, latest release
    • /fetch-protos opencode 0.2.0 → opencode at 0.2.0
    • /fetch-protos flipcash scaffold → flipcash latest, scaffolding new RPCs

Steps

Step 1 — Find the release

gh release list --repo code-payments/<ocp|flipcash2>-client-protocol --limit 10

Compare against the pin in gradle/libs.versions.toml. If the pinned version is already the latest and no version was requested, say so and stop.

If the contract change you want has not been released, do not reach for a release. Publishing is for CI release builds; Maven Central will not take a version number twice, so cutting one to try a field burns a real version. Build against the client checkout instead, by adding the workspace root to local.properties:

Read the full file on GitHub · 334 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 1mo ago Changed · +5 lines · +4 tokens per session 05836602b72f
  2. 1mo ago Changed dc615c42065e
  3. 2mo ago First seen · 329 lines · 42 tokens per session scan A eeec73cfa3f3

Subscribe to this mod's changes

fetch-protos is a skill published in the GitHub repository code-payments/code-android-app (23 stars, last pushed today), licensed MIT. It adds 46 tokens to every session and 3,295 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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